I have followed instructions at the SEED page,
when calling
myrast get:

Can't load '/usr/lib/myrast/lib/perl5/site_perl/5.12.3/i686-linux/auto/Wx/Wx.so' for module Wx: libwx_gtk2u_adv-2.8.so.0: cannot open shared object file: No such file or directory at /usr/lib/myrast/lib/perl5/5.12.3/i686-linux/DynaLoader.pm line 200.
at /usr/lib/myrast/lib/perl5/site_perl/5.12.3/wxPerl/Constructors.pm line 100
Compilation failed in require at /usr/lib/myrast/lib/perl5/site_perl/5.12.3/wxPerl/Constructors.pm line 100.
BEGIN failed--compilation aborted at /usr/lib/myrast/lib/perl5/site_perl/5.12.3/wxPerl/Constructors.pm line 100.
Compilation failed in require at /usr/lib/myrast/lib/GenomeInfoPanel.pm line 10.
BEGIN failed--compilation aborted at /usr/lib/myrast/lib/GenomeInfoPanel.pm line 10.
Compilation failed in require at /usr/lib/myrast/lib/myRASTApp.pm line 6.
BEGIN failed--compilation aborted at /usr/lib/myrast/lib/myRASTApp.pm line 6.
Compilation failed in require at /usr/lib/myrast/plbin/dtr.pl line 2.
BEGIN failed--compilation aborted at /usr/lib/myrast/plbin/dtr.pl line 2

How to fix that and how to call MyRAST 32 and -64 from the command line?

You could crack open those perl files and see what is might be tripping the error at those lines (if you have not already). I see there is an ubuntu specific distribution, you could try that. Linux mint looks nice but Ubuntu is so popular that googling errors is usually much easier.